AP7311-15WG-7

Overview

The AP7311-15WG-7 is a fixed-output low dropout linear regulator providing 1.5V at up to 150mA. It operates with an input voltage range of 2V to 6V and features a typical quiescent current of 65µA. The device offers a typical dropout voltage of 150mV at full load, a power supply rejection ratio of 65dB at 100Hz, and a fast start-up time of 80µs. It includes built-in current limit, short circuit, and thermal shutdown protections, operating within an ambient temperature range of -40°C to 85°C in an SOT25 package.

Feature Summary

• Provides stable regulated output with very low quiescent current across the entire load range.
• Features ultra-fast start-up time and excellent transient response for rapidly changing loads.
• Includes comprehensive protection mechanisms such as current limiting, short circuit protection, and thermal shutdown.
• Operates stably with small value ceramic capacitors having low equivalent series resistance.

Applications

• Battery powered devices
• Portable devices
• Notebook and desktop computers and peripherals
• CD-ROM, DVD and LAN cards

Procurement Notes

Verify the specific part number suffix against official Diodes Incorporated documentation to confirm the fixed 1.5V output configuration and SOT25 packaging. Ensure compatibility with RoHS compliance standards required for your assembly process. Confirm that the ordering information matches the intended production volume and tape-and-reel specifications before finalizing procurement orders.

Selection Notes

Select this component when a low quiescent current and fast transient response are critical for battery life extension in portable electronics. It is suitable for applications requiring a fixed 1.5V rail from a 2V to 6V input source. Consider its thermal performance and power dissipation limits relative to the expected load current and ambient temperature conditions during design integration.

Part Context

This regulator belongs to the AP7311 family of low dropout linear regulators designed for low power applications. The series is characterized by its ability to maintain regulation with minimal ground current consumption while supporting high peak currents. It utilizes a CMOS process technology to achieve high efficiency and fast dynamic response times compared to traditional bipolar LDOs.

Replacement Considerations

Consult official manufacturer substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics carefully if considering generic equivalents.

FAQ

What is the minimum capacitance required for stable operation?

The device requires a minimum of 1µF ceramic capacitor on both the input and output pins for stability.

How does the enable pin function?

The EN pin is active high; setting it to a logic high level turns the regulator on, while pulling it low shuts it down.